Hi. I've been looking for a recording of this, too, so please keep me posted. The lyrics are:

Freedom doesn't come like a bird on the wing
It doesn't come down like the summer rain
Freedom, freedom is a hard-won thing
You've got to work for it, fight for it
Day and night for it
And every generation got to win it again
Pass it on to your children, mother
Pass it on to you children, brother
You've got to work for it, fight for it, day and night for it
Pass it on to your children
Pass it on.